There are two types of light-sensitive cells in the human eye :
(a) Where are they found ?
(b) What is each type called ?
(c) To what is each type of cell sensitive ?

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Solution

(a) The light-sensitive cells are found in the retina of our eyes
(b) These cells are of two types. One type of cell is cone shaped, while the other type is rod shaped. They are called cones and rods respectively.
(c) The rod cells respond to intensity or brightness of light.
The cone cells respond to colours. The cones make it possible to distinguish between different colours.

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12. Retina of Human Eye is made of two kinds of cells. Which of the following statements are true with respect to the same ?

1. Rods are the cells which are sensitive to the bright light and colour.

2. Cons are the cells which are sensitive to the dim light.

What are the cells that are sensitive to bright light called and low light called?
[2 MARKS]

Name the cells on the retina of an eye:

(a) which are sensitive to bright light.

(b) which are sensitive to dim light.

Which of the following cells in eyes are sensitive to dim light?

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